How to identify the yin and yang of tree bonsai?

The identification of yin and yang of trees includes the following aspects: (1) coniferous trees, mostly positive trees; However, some cypresses with flat or scaly leaves, as well as bamboo cypress and arhat pine, are mostly negative trees.

(2) Evergreen broad-leaved tree species, such as boxwood, holly, Phoebe bournei, Ardisia japonica, camellia, etc. Most of them are shade-tolerant; While deciduous broad-leaved trees such as plum, peach, begonia, crape myrtle, bromeliad, pomegranate, elm and cypress are mostly fond of light. Dense branches and leaves are more resistant to shade, and branches and leaves with sparse crowns prefer light.

(3) Most broad-leaved trees with thick or leathery leaves are shade-tolerant; Broad-leaved trees with thin and large leaves like light.

(4) Small shrubs under wild forests, such as tiger thorn, six in the snow, southern bamboo, Mahonia, flat wood, etc. Most of them are shade-tolerant; Most tree species originally grow in the wilderness or sunny slopes, such as rhododendron, beech, medlar, Vitex negundo, Bromus, etc. , all like light.

The light and shade tolerance of tree bonsai are closely related to the placement location and management measures, and can not be placed casually against its biological characteristics. Shade-tolerant bonsai trees must be shaded in summer. In addition, the temperature and cold tolerance of trees are also very important for the placement and management of bonsai. Generally, cold-resistant trees can be put outdoors for winter without cold protection. In order to prevent the basin soil from freezing and cracking, the basin surface can be exposed to the ground and buried underground. Bonsai trees in the south can stay in place in winter. Some trees that are not cold-tolerant, such as camellia, Michelia, Fujian tea, kumquat and banyan, are potted in the northern part of the Yangtze River basin and must be moved indoors or in greenhouses in winter.